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sandhya santhanagopalansandhya santhanagopalan 

There was an error saving the page: The c:NewRace component isn't allowed in the main region. The component doesn't implement any of the region's allowed interfaces.

error saving creating a lightning app page.i have inculded implements=force:appHostable,flexipage:availableForAllPageTypes in aura component
NagendraNagendra (Salesforce Developers) 
Hi Sandhya,

Can you check if you have the correct implementations? without any typos (lowercase/uppercase). it should be 
Hope this helps.

Please mark this as solved if it helps.